Systems, devices, and/or methods for managing water-borne debris

ABSTRACT

Certain exemplary embodiments can provide a system, machine, device, configured for cleaning debris from water in a water container via a water cleaner that includes a handle, a collection net configured to collect debris resident in the water, and a frame configured to hold substantially open a primary inlet of the net.

BRIEF DESCRIPTION OF THE DRAWINGS

A wide variety of potential, feasible, and/or useful embodiments will bemore readily understood through the herein-provided, non-limiting,non-exhaustive description of certain exemplary embodiments, withreference to the accompanying exemplary drawings in which:

FIG. 1 is a perspective view of an exemplary water cleaner as it wouldappear in an operating mode.

FIG. 2 is a side view of the exemplary water cleaner of FIG. 1 as itwould appear in an operating mode.

FIG. 3 is a front view of the exemplary water cleaner of FIG. 1 as itwould appear in an operating mode.

FIG. 4 is an magnified view of detail B of FIG. 4.

FIG. 5 is a photo showing flow over and under an exemplary hydrodynamiclift blade when in a stall orientation.

FIG. 6 is the photo of FIG. 5 overlaid by an illustration of a portionof an exemplary water cleaner.

FIG. 7 is an side view of an exemplary water cleaner as it would appearin an operating mode, with debris entrained in a first flow stream thatpasses along and/or above the top surface of the hydrodynamic lift bladeand with debris entrained in a second flow stream that passes alongand/or below a lower surface of the hydrodynamic lift blade.

FIG. 8 is a side view of an exemplary embodiment of a water cleanerbeing used as a surface skimmer to gather floating debris from thesurface of a water container.

FIG. 9 is a top perspective view of an exemplary embodiment of a watercleaner having a lift blade that is connected to the frame of the watercleaner via fixed arms.

FIG. 10 is a bottom perspective view of an exemplary embodiment of awater cleaner 1010 having a lift blade that is connected to the frame ofthe water cleaner via fixed arms.

FIG. 11 is a side view of the exemplary water cleaner of FIG. 10 as itwould appear in an operating mode.

FIG. 12 is a side view of an exemplary water cleaner.

FIG. 13 is a side view of an exemplary water cleaner.

FIG. 14 is a side view of an exemplary water cleaner.

FIG. 15 is a side view of an exemplary water cleaner.

DESCRIPTION

Certain exemplary embodiments can provide a novel and inventive nettedwater cleaner, which can be used to remove water-borne and/orcontainer-supported debris from a water container, such as from thewater of a swimming pool, hot tub, fountain, fish pond, bird bath, fishtank, water garden, sump, collection basin, pond, stream, river, etc.With certain exemplary embodiments, there need be no necessity to movethe water cleaner forward and backward along the floor of the body ofwater to agitate the debris or near the floor and then capture thatdebris within the attached net. Likewise, using certain exemplaryembodiments, it can be unnecessary to agitate and/or lift the debris bypushing the collection blade over the debris, followed by pulling thecleaner back a foot or so, and then pushing the cleaner forward again tocapture the agitated and lifted debris.

Instead, in a single pass, a smooth surfaced, foil-shaped, and/orhydrodynamic lift blade can substantially hydrodynamically (but notmechanically) agitate the debris, resulting in most, if not all, of thatdebris being caught and/or entrained in flow streams that pass overand/or under the hydrodynamic lift blade, over a collection blade, andinto the net. Thus, by utilizing two blades, where the leading firstblade hydrodynamically can agitate and/or lift the debris and the secondblade can guide the agitated debris into the net, all in a singleforward pass of the water cleaner, a more efficient and/or effectivecleaning of the water can result.

One or more of these beneficial results can be accomplished by providinga hydrodynamic lift blade located in front of (relative to the directionof movement of the water cleaner) a debris collection blade of the watercleaner. The lift blade can be separated from and/or held off the floorby a gap measuring approximately 0.2 inches to approximately 2 inches(including all values and subranges therebetween), which can be createdusing one or more separators (e.g., sliders, rollers, spacers, etc.)typically positioned along and/or on one or both ends of thehydrodynamic lift blade and/or one or more arms via which the lift bladeis attached to a net rim and/or frame of the water cleaner. This gapbetween the lowest portions of the lift blade and the floor can allowthe lift blade to traverse the debris so that the fluid vortices createdbeneath, behind, and/or by the passing of the hydrodynamic lift bladecan scrub and/or scour the floor and direct the agitated debris, via thevortexed and/or turbulent flow streams, into the debris collection net.

FIGS. 1, 2, and 3 illustrate an exemplary water cleaner 1000. Thisexemplary embodiment can comprise a frame 1100 that can include a poleand/or handle mount 1120 configured to receive and/or attach to a poleand/or handle 1200. Frame 1100 can be generally rigid and/or can supportand keep open the inlet to a mesh debris collection and/or containmentnet 1300. Attached or integral to frame 1100 can be a collection blade1400 that can be configured to scrape along the bottom of a watercontainer 1900 and/or act as a shovel and/or scoop to direct debris onthe bottom and/or floor 1920 of water container 1900 into net 1300 ashandle 1200 is held at approximately 15 to approximately 45 degree angle(including all values and sub-ranges therebetween) relative to floor1920 while being pushed forward. A hydrodynamic lift blade assembly 1500can include one or more pivot arms 1600, corresponding pivots 1650, oneor more separators 1700, and/or a lift blade 1800. Pivot arm(s) can beintegral to and/or rigidly attached to lift blade 1800. A substantiallyresilient biaser 1670 (such as a rubber band; elastic frame, ball,chain, band, strip, cord, thread, and/or string; shape memory device;tension and/or extension spring; compression spring; helical spring;spiral spring; torsion spring; constant force spring; leaf spring;spring clip; paired magnets, gas-filled and/or pneumatic ball, bladder,and/or container; bowstring, etc.) that is configured to bias at leastone pivot arm 1600 toward frame 1100 and/or that can connect to frameport 1190 and arm port 1690.

After hydrodynamic lift blade assembly 1500 is connected to frame 1100,tension springs 1670 can be connected between frame port 1190 and armport 1690.

FIG. 2 illustrates how net-bound flow streams 1960, 1970, and/or 1980can be created and/or altered when water cleaner moves toward the leftin FIG. 2 in a way that allows debris to rise from floor 1920, overcollection blade 1400, which can be the leading part of frame 1100, andthrough the inlet to net 1300, such that the debris is trapped in net1300. Also shown in FIG. 2 a manner in which the swing arms 1600 canrotate about pivot 1650, allowing separators 1700, with the aid of theone or more tension springs 1670, to hold the leading edge 1820 of liftblade 1800 at a fixed distance above and away from floor 1920. The fixeddistance, space, and/or gap 1750 (best seen in FIG. 3) between floor1920 and leading edge 1820 of lift blade 1800 can be on the order offrom approximately 0.2 inches to 2 inches, including all values andsubranges therebetween, such as approximately 0.33, 0.4721, 0.50, 0.625,0.768, 0.98, 1.25, 1.512, 1.8, etc. inches.

As shown in FIG. 3, one or more continuous, uninterrupted gaps 1750 canextend unimpeded for a substantial portion of the length of lift blade1800, such as for approximately 33 percent to approximately 100 percentof the length of lift blade 1800, including all values and sub-rangestherebetween, e.g., approximately any of 42.15, 50, 66.7, 80.1, 90,95.25, etc. percent. Such a wide and uninterrupted gap can allow piecesof debris that are not as wide and not as tall as gap 1750 (with respectto the dimensions of gap 1750) to fit through gap 1750 and beneath liftblade 1800 as those pieces of debris are entrained in flow stream 1980,which itself can span the width of gap 1750. That is, any of many, amajority of, and/or substantially all pieces of debris can becomeentrained in and move along in flow stream 1980 beneath lift blade 1800without contacting lift blade 1800 and/or water cleaner 1000.Substantially unimpeded movement of debris below and/or over lift blade1800 can be further facilitated by providing a substantially smoothbottom surface 1880 and/or top surface 1860 on lift blade 1180. Thus,the dimensions of gap(s) 1750, the shape and/or orientation of liftblade 1800, and/or the surface finish of lift blade 1800 cansubstantially lower the likelihood of (and in many cases completelyavoid) direct physical contact between a given piece of debris and liftblade 1800 (i.e., the debris touching lift blade 1800), and thereforecan substantially lower the likelihood of (and in many cases completelyavoid) direct momentum transfer from lift blade 1800 to the debris.Avoiding physical contact between debris and lift blade 1800,separator(s) 1700, and/or water cleaner 1000 can lower the effort neededto cause the debris to flow passed lift blade 1800 and into net 1300.Also, minimizing and/or avoiding physical contact between floor 1920 andlift blade 1800, separator(s) 1700, and/or water cleaner 1000 can lowerthe effort needed to move water cleaner 1000 over a given portion offloor 1920. Moreover, avoiding contact between debris and lift blade1800, separator(s) 1700, and/or water cleaner 1000 can facilitateagitating, lifting, and/or entraining substantially all debris that canfit through gap 1750 and/or beneath water cleaner 1000 without requiringmultiple passes of water cleaner 1000 over that debris and/or thecorresponding portion of floor 1920. This can be particularly helpfulwhen debris is relatively small, such as with sand and similarly sizedorganic matter, which might otherwise require numerous passes and/orvacuuming floor 1920. Debris having dimensions that are larger thanthose of gap 1750 can become entrained in flow stream 1970 and/or flowstream 1960 and thereby flow above lift blade 1800 and into net 1300.Likewise, debris that is not in contact with floor 1920 at the timewater cleaner 1000 approaches can become entrained in flow stream 1970and/or flow stream 1960 and thereby flow above lift blade 1800 and intonet 1300. In the event debris becomes caught on lift blade 1800, such asby wrapping partially around lift blade 1800 and extending into and/orthrough gap 1750 and over lift blade 1800, or becomes caught on aseparator 1700, the lack of hydrodynamically unfriendly flow impediments(e.g. protrusions and/or bristles) on the surfaces of lift blade 1800can allow for relatively easy removal of that debris.

This magnitude of clearance height and/or gap 1750 can allow most debrisresting on floor 1920 to remain stationary until hydrodynamic lift blade1800 passes directly vertically over. Once blade 1800 traverses thedebris, one or more vortices and/or eddies of turbulence can be createdby the negative pressure directly under and behind blade 1800, which canscrub and/or scour floor 1920.

As seen in FIG. 4, which magnifies detail B from FIG. 3, hydrodynamiclift blade assembly 1500 can be attached to frame 1100 by spreading theends of pivot arms 1600 outward (at pivots 1650), and allowing theplacement of pivots 1650, which can be cylindrical protrusions frompivot arms 1600 and/or can be integral to pivot arms 1600, to becontained within pivot receivers 1150, which can be recesses in frame1100. Note that frame 1100 can provide any number of pivot receivers1150 and/or corresponding pairs of pivot receivers, which can allow forvarying the mounting height of hydrodynamic lift blade assembly 1500with respect to frame 1100, collection blade 1400, and/or floor 1920.Pivots 1650 can utilize set screws that can non-destructably releaseablyconnect hydrodynamic lift blade assembly 1500 and/or pivot arms 1600 toany desired location on the sides of frame 1100, thereby allowing for(potentially in combination with separators of a variety of heights) theability to vary as desired the height of gap 1750, the attack angle ofhydrodynamic lift blade 1800, and/or the restoring force operating onhydrodynamic lift blade assembly 1500. Arms 1600 (or 1610 or 1620—seeFIGS. 9-15) can be adjustable in length to allow hydrodynamic lift blade1800 to extend further out in front of frame 1100. Hydrodynamic liftblade 1800 can be adjustable in its angle of attack, such as byconnecting it to arms 1600 via screws, which potentially have theirheads located over washers. Multiple hydrodynamic lift blades 1800 canbe employed as desired to obtain the desired flow pattern(s). Having theability to adjust the distance between hydrodynamic lift blade 1800 andframe 1100, the angle of attack of hydrodynamic lift blade 1800, and thenumber of hydrodynamic lift blades 1800 can allow for ease of debriscollection in variable depths of water, via people having variablestrength, and/or using variations in the speed of forward movement ofpole 1200.

FIG. 5 is a photograph that illustrates the hydrodynamic flow around anfoil-shaped, relatively smooth-surfaced blade when the blade has anangle of attack of approximately 30 degrees to the direction of flow(which is from right to left in FIG. 5 and FIG. 6). The low pressurezone created beneath and/or behind the blade can cause water to belifted from the floor to fill the low pressure zone, creating vortices,eddies, and/or turbulence. FIG. 6 is the photograph of FIG. 5 over whicha drawing of a lower portion of an exemplary water cleaner has beenplaced. Notice how, when the lift blade is properly designed relative tothe collection blade and collection net, the turbulence generated whenmoving the lift blade over the floor (from left to right in this figure)can scrub and/or scour the floor and the vortex motion of thatturbulence can direct the dislodged debris into the net. The tensionspring can allow the pivot arm(s) the flexibility to position themselvesso that both the collection blade, which can be an integral part of theframe, and the hydrodynamic lift blade can be constantly in the optimumposition relative to the floor for maximum effectiveness. When not inuse the tension springs can hold the pivot arm(s) and/or lift bladeagainst the frame (shown in FIG. 8).

As shown in FIG. 7, an overall flow pattern (combination of flowstreams) that can cause the disturbance and flow of debris 1990 asintended can be the result of the negative pressure pattern that candevelop under a hydrodynamic lift blade when the angle of attack reachesa critical value. For angles of attack above this critical value, a flowstream 1980 that flows below, adjacent, and/or in contact with bottom,lower, and/or under surface 1880 of lift blade 1800 and can begin tovortex. The condition is shown in FIG. 7, which illustrates thevortices, eddies, and/or turbulence that arises in flow stream 1980.

FIG. 8 shows an exemplary water cleaner 1000 when it is being used toskim leaves off the surface of the water container, or for use tocollect suspended debris within the water container. Note that in thesecases, the tension spring(s) 1670 can retract the pivot arm(s) 1600and/or lift blade 1800 down and against frame 1100. Also note that theentire entry to net 1300 can be and/or remain open to accept debrisand/or to dump debris from net 1300.

FIG. 9, FIG. 10, FIG. 11, and FIG. 12 show an alternative embodiment1010 of water cleaner 1000, with similar parts labeled similarly. Moreparticularly, FIG. 9 and FIG. 10 show, respectively, a top perspectiveview and bottom perspective view of alternative water cleaner 1010,which utilizes the hydrodynamic principal via lift blade 1800 in a fixedpositional and/or angular relationship to collection blade 1400, suchthat the effective angle of lift blade 1800 can be a function of theangle of the longitudinal axis of handle 1200 to floor 1920. That is,with this alternative water cleaner 1010, the at least partiallyrotatable pivot arm(s) of water cleaner 1000 can be replaced with fixedarms 1610, which can be integral or attached to lift blade 1800,integral or attached to frame 1100, fixedly or non-destructablyremovable from frame 1100, and/or need not operatively provide forrelative translation and/or relative rotation between lift blade 1800and frame 1100.

As can be seen in FIG. 11, because collection blade 1400 andhydrodynamic lift blade 1800 operatively can be continually fixed inposition relative to one another, and because separator 1700 is notprovided, the height of gap 1750 can be substantially dependent on theangle of handle 1200 relative to floor 1920 and/or on the height of liftblade relative to the height of collection blade 1400. Thus, it ispossible with this embodiment for lift blade to contact floor 1920.Consequently, the performance of lift blade 1800 can directly depend onsuch blade heights and/or the angle of handle 1200 when water cleaner1010 is in use. Nevertheless, even without the use of separators,separation between lift blade 1800 and floor 1920 can be sufficient toprovide an adequate overall flow pattern, flow stream 1980, and/or flowstream 1960. This can be accomplished in many typical operationalsituations by making collection blade 1400 extend sufficiently lowerthan lift blade 1800 that gap 1750 is very likely to exist, and with aheight sufficient to create the desired agitation, lift, and/or effects(e.g. laminar flow, turbulent flow, etc.) in the overall flow pattern,flow stream 1980, and/or flow stream 1960.

As illustrated in FIG. 12, this potential limitation can be mitigated tosome extent by providing one or more separators 1710 to help maintain adesired height of gap 1750 and/or to avoid contact between lift blade1800 and floor 1920. Separator(s) 1710 can be integral and/or attached(e.g., fixedly, non-destructively releaseably, and/or pivotably, etc.)to lift blade 1800. As with separator(s) 1700, separator(s) 1710 can berelatively small in width compared to the width of lift blade 1800,potentially allowing one or more gaps 1750 to extend unimpeded for asubstantial portion of the length of lift blade 1800, such as forapproximately 33 percent to approximately 100 percent of the length oflift blade 1800, including all values and sub-ranges therebetween, e.g.,approximately any of 42.15, 50, 66.7, 80.1, 90, 95.25, etc. percent.Heightwise, even when handle 1200 is angled with respect to floor 1920,separator(s) 1710 can extend vertically to a position below thebottom-most point of lift blade 1800.

As illustrated in FIG. 13, pivot arms 1600 of FIG. 2 and fixed arms 1610of FIG. 11 are replaced with one or more resilient arms 1620, which canbe formed from a shape memory material and which can function to keepseparator 1720 pressed firmly against floor 1920 when water cleaner 1000is in operation. Resilient arm(s) 1620 can be attached to frame 1100fixedly, non-destructively releaseably, and/or pivotably, etc.Similarly, lift blade 1800 can be attached to resilient arm(s) 1620fixedly, non-destructively releaseably, and/or rotateably, etc.Likewise, separator(s) 1720 can be coupled to lift blade 1800 fixedly,non-destructively releaseably, and/or rotateably, etc. Note that byusing one or more resilient arms 1620, biaser 1670 of FIG. 2 can beeliminated, however arms 1620 might not retract as far as the pivotablearms 1600 of FIG. 2. Note also that because resilient arms 1620 can keepseparator 1720 pressed firmly against floor 1920 when water cleaner 1000is in operation, resilient arms 1620 can help ensure that lift blade1800 does not contact floor 1920 and/or that gap 1750 maintains a heightsufficient for debris to operatively pass under lift blade 1800.

A different embodiment of resilient arm(s) 1620 is illustrated in FIG.14. In this embodiment, resilient arm(s) 1620 can comprise one or morerigid arm members and an integral and/or interior resilient biaser 1670,such as a compression spring or a coil spring, that helps keep separator1720 pressed firmly against floor 1920 when water cleaner 1000 is inoperation. Likewise, FIG. 15 illustrates an external biaser connected toa one or more fixed arms 1610. In each of these embodiments, rather thanthe entirety of the arm(s) assembly being formed from a resilientmaterial, a biaser can be integral to, internal to, and/or attachedexternally to an arm member to provide the desired restoring force thatcan help keep lift separator pressed firmly against floor 1920 and/orcan help keep gap 1750 within a desired height range.

In various embodiments, resilient arm(s) 1620 can be attached to frame1100 fixedly, pivotably, rotateably, slideably, non-destructivelyreleaseably, etc. Similarly, lift blade 1800 can be attached toresilient arm(s) 1620 fixedly, pivotably, rotateably, slideably,non-destructively releaseably, etc. Likewise, separator(s) 1720 can becoupled to lift blade 1800 fixedly, pivotably, rotateably, slideably,non-destructively releaseably, etc. Note that by using one or moreresilient arms 1620, biaser 1670 of FIG. 2 and/or FIG. 15 can beeliminated, however arms 1620 might not retract as far as the arm(s)1600 of FIG. 2 and/or arm(s) 1620 of FIG. 15. Note also that arm(s) 1600and/or 1620 can keep separator 1700, 1710, and/or 1720 pressed firmlyagainst floor 1920 when water cleaner 1000 is in operation, arm(s) 1600and/or 1620 can help ensure that lift blade 1800 does not contact floor1920 and/or that gap 1750 maintains a height sufficient for debris tooperatively pass under lift blade 1800.

As with separator(s) 1700, separator(s) 1710 and/or 1720 can berelatively small in width compared to the width of lift blade 1800,potentially allowing one or more gaps 1750 to extend unimpeded for asubstantial portion of the length of lift blade 1800, such as forapproximately 33 percent to approximately 100 percent of the length oflift blade 1800, including all values and sub-ranges therebetween, e.g.,approximately any of 42.15, 50, 60, 66.7, 80.1, 90, 95.25, etc. percent.Heightwise, even when handle 1200 is angled with respect to floor 1920,separator(s) 1710 and/or 1720 can extend vertically to a position belowthe bottom-most point of lift blade 1800.

Certain exemplary embodiments can provide a water cleaner, comprising:

-   -   a handle;    -   a collection net configured to operatively collect debris        resident in water of a water container;    -   a frame configured to attach to the handle and to operatively        and substantially hold open a major inlet of the net;    -   a collection blade integral to or attached to a bottom edge of        the frame, the collection blade configured to operatively        traverse along and/or adjacent to a floor of the water        container; and/or    -   a hydrodynamic assembly configured to be attached to the frame,        the lift assembly comprising:        -   an elongated hydrodynamic lift blade that defines a            hydrodynamic lift blade longitudinal axis, a length, a            substantially smooth upper surface, and/or a substantially            smooth lower surface;        -   at least one arm configured to operatively attach the            hydrodynamic lift blade to the frame, the water cleaner            configured to operatively resiliently bias the hydrodynamic            lift blade toward the floor; and/or        -   the water cleaner configured to operatively define a gap            between the hydrodynamic lift blade and the floor, the gap            extending uninterrupted for at least 50 percent of the            length of the hydrodynamic lift blade;    -   further comprising:        -   at least one separator configured to operatively contact the            floor of the water container;        -   at least one separator configured to operatively slide along            the floor of the water container; and/or        -   at least one separator configured to operatively roll along            the floor of the water container;    -   wherein:        -   the hydrodynamic lift blade is configured to cause            substantially turbulent flow in a flow stream that passes            substantially below the hydrodynamic lift blade when the            water cleaner moves in a direction that is substantially            parallel to a plane of the floor of the water container;        -   the hydrodynamic lift blade is configured to maintain            substantially laminar flow in a flow stream that passes            substantially above the hydrodynamic lift blade when the            water cleaner moves in a direction that is substantially            parallel to a plane of the floor of the water container;        -   the hydrodynamic lift blade is configured to operatively            entrain in a net-bound flow stream debris resting on the            floor of the water container without touching that debris;        -   the hydrodynamic lift blade is configured to operatively            direct debris into the collection net without touching that            debris;        -   the collection blade is configured to substantially prevent            debris entrain in a net-bound flow stream by the            hydrodynamic lift blade from flowing under the net when the            water cleaner moves in a direction that is substantially            parallel to a plane of the floor of the water container;        -   the hydrodynamic assembly is configured to non-destructively            removeably attach to the frame;        -   the at least one pivot arm is configured to            non-destructively releaseably attach to the frame;        -   a longitudinal cross-section of the hydrodynamic lift blade            is hydrofoil-shaped;        -   the at least one separator is integral to or attached to the            at least one pivot arm;        -   the at least one separator is integral to or attached to the            hydrodynamic lift blade;        -   the water cleaner operatively biases the hydrodynamic lift            blade toward the frame; and/or        -   a position of the hydrodynamic lift blade with respect to            the collection blade is operatively variable.

Certain exemplary embodiments can provide a water cleaner, comprising:

-   -   a handle;    -   a collection net configured to operatively collect debris        resident in water of a water container;    -   a frame configured to attach to the handle and to operatively        hold substantially open a primary inlet of the net;    -   a collection blade integral to or attached to a bottom edge of        the frame, the collection blade configured to operatively        traverse along and/or adjacent to a floor of the water        container; and/or    -   a hydrodynamic lift assembly configured to be attached to the        frame, the hydrodynamic lift assembly comprising:        -   an elongated hydrodynamic lift blade that defines a            hydrodynamic lift blade longitudinal axis;        -   at least one arm configured to operatively attach the            hydrodynamic lift blade to the frame; and/or        -   at least one separator configured to operatively prevent            direct contact between the hydrodynamic lift blade and the            floor and between the hydrodynamic lift blade and debris            supported by the floor;    -   wherein:        -   the hydrodynamic lift blade is configured to operatively            cause substantially turbulent flow in a flow stream that            passes substantially below the hydrodynamic lift blade when            the water cleaner moves in a direction that is substantially            parallel to a plane of the floor of the water container;        -   the at least one arm is configured to operatively remain in            a fixed position with respect to the frame; and/or        -   the hydrodynamic lift blade is configured to operatively            remain in a fixed position with respect to the frame.

Certain exemplary embodiments can provide a water debris entrainmentassembly configured to be attached to a frame of a net device that isconfigured to collect debris from water in a water container, the netdevice comprising a collection blade configured to scrape a floor of thewater container, the assembly comprising an elongated hydrodynamic liftblade that defines a hydrodynamic lift blade longitudinal axis, thehydrodynamic lift blade operatively configured to:

-   -   be located forward of the collection blade with respect to        operative movement of the net device;    -   define an uninterrupted gap between itself and the floor of at        least 0.2 inches along at least 70% of the length of        hydrodynamic lift blade when the collection blade is in contact        with the floor;    -   direct debris into the collection net without touching that        debris; and/or    -   simultaneously cause, when the collection blade is in contact        with and moves along the floor, substantially turbulent flow in        a first flow stream that passes below the hydrodynamic lift        blade and substantially laminar flow in a second flow stream        that passes above an upper surface of the hydrodynamic lift        blade.

Definitions

When the following phrases are used substantively herein, theaccompanying definitions apply. These phrases and definitions arepresented without prejudice, and, consistent with the application, theright to redefine these phrases via amendment during the prosecution ofthis application or any application claiming priority hereto isreserved. For the purpose of interpreting a claim of any patent thatclaims priority hereto, each definition in that patent functions as aclear and unambiguous disavowal of the subject matter outside of thatdefinition.

-   -   a—at least one.    -   about—around and/or approximately.    -   above—over, at a higher level and/or place, and/or on top of.    -   across—from one side to another.    -   activity—an action, act, step, and/or process or portion        thereof.    -   adapt—to design, make, set up, arrange, shape, configure, and/or        make suitable and/or fit for a specific purpose, function, use,        and/or situation.    -   adapter—a device used to effect operative compatibility between        different parts of one or more pieces of an apparatus or system.    -   adjacent—close to; lying near; next to; adjoining, and/or within        a horizontal radius of approximately 0.2 to approximately 2        inches of, including all values and subranges therebetween.    -   after—following in time and/or subsequent to.    -   agitate—to upset, disturb, shake, and/or stir and/or to cause to        move vigorously.    -   agitator—a device configured to upset, disturb, shake, scour,        and/or stir and/or to cause to move vigorously.    -   along—through, on, beside, over, in line with, in contact with,        and/or parallel to the length and/or direction of; and/or from        one end to the other of.    -   and—in conjunction with.    -   and/or—either in conjunction with or in alternative to.    -   any—one, some, every, and/or all without specification.    -   apparatus—an appliance or device for a particular purpose.    -   approximately—about and/or nearly the same as.    -   arm—an elongated structural member, which need not be solely        linear.    -   around—about, surrounding, and/or on substantially all sides of;        and/or approximately.    -   as long as—if and/or since.    -   assembly—a plurality of coupled components; and/or a group of        parts forming a self-contained, independently mounted unit.    -   associate—to join, connect together, and/or relate.    -   at—in, on, and/or near.    -   at least—not less than, and possibly more than.    -   attach—to fasten, secure, couple, and/or join.    -   axis—a straight line about which a body and/or geometric object        rotates and/or can be conceived to rotate and/or a center line        to which parts of a structure and/or body can be referred.    -   based on—indicating one or more factors that affect a        determination, but not necessarily foreclosing additional        factors that might affect that determination.    -   be—to exist in actuality.    -   below—beneath; in a lower place; and/or less than.    -   between—in a separating interval and/or intermediate to.    -   bias—to urge in a direction.    -   blade—a foil and/or a relatively thin rigid arm having flat or        sometimes curved surfaces, which is moved by and/or used to        cause motion in a fluid.    -   bottom—a lowest part of an object relative to a point of        reference, the object in a predetermined orientation relative to        the point of reference.    -   bound—going toward, heading toward, and/or on a certain path        toward.    -   by—via and/or with the use and/or help of    -   can—is capable of, in at least some embodiments.    -   cause—to bring about, provoke, precipitate, produce, elicit, be        the reason for, result in, and/or effect.    -   cause—to bring about, provoke, precipitate, produce, elicit, be        the reason for, result in, and/or effect.    -   circuit—an electrically conductive pathway and/or a        communications connection established across two or more        switching devices comprised by a network and between        corresponding end systems connected to, but not comprised by the        network.    -   cleaning—the dislodging of extraneous matter and/or debris.    -   collect—to accumulate and/or gather.    -   composition of matter—a combination, reaction product, compound,        mixture, formulation, material, and/or composite formed by a        human and/or automation from two or more substances and/or        elements.    -   comprising—including but not limited to, what follows.    -   configure—to design, arrange, set up, shape, and/or make        suitable and/or fit for a specific purpose, function, use,        and/or situation.    -   configured to—designed, arranged, set up, shaped, and/or made        suitable and/or fit for a specific purpose, function, use,        and/or situation, and/or having a structure that, during        operation, will perform the indicated activity(ies). To the        extent relevant to the current application, the use of        “configured to” is expressly not intended to invoke 35 U.S.C. §        112(f) for that structure.    -   connect—to join or fasten together.    -   constrain—to restrict, limit, regulate, and/or restrain within        bounds.    -   contact—to touch and/or come together.    -   containing—including but not limited to.    -   convert—to transform, adapt, and/or change.    -   corresponding—related, associated, accompanying, similar in        purpose and/or position, conforming in every respect, and/or        equivalent and/or agreeing in amount, quantity, magnitude,        quality, and/or degree.    -   coupleable—capable of being joined, connected, and/or linked        together.    -   coupling—linking in some fashion.    -   create—to bring into being.    -   cross-section—a section formed by a plane cutting through an        object at a right angle to an axis.    -   debris—an undissolved extraneous solid substance present in the        water of a water container but not attached to the water        container, such as something submerged, floating on the surface,        or supported by the bottom of the container, e.g., leaves,        seeds, blooms, stems, sticks, clippings, mulch, water plants,        algae, worms, insects, crustaceans, minnows, small animals,        remains, food waste, organic matter, gravel, sand, fishing        lures, toys, jewelry, and/or trash, etc.    -   define—to establish the meaning, relationship, outline, form,        and/or structure of; and/or to precisely and/or distinctly        describe and/or specify.    -   derive—to receive, obtain, and/or produce from a source and/or        origin.    -   determine—to find out, obtain, calculate, decide, deduce,        ascertain, and/or come to a decision, typically by        investigation, reasoning, and/or calculation.    -   device—a machine, manufacture, and/or collection thereof.    -   direct—to point, aim, and/or send toward a place or object        and/or to cause to move in or follow a predetermined course.    -   direction—a spatial relation between something and a course        along which it points and/or moves; a distance independent        relationship between two points in space that specifies the        position of either with respect to the other; and/or a        relationship by which the alignment and/or orientation of any        position with respect to any other position is established.    -   each—every one of a group considered individually.    -   edge—a periphery, border, and/or boundary at which a surface        terminates.    -   effective—sufficient to bring about, provoke, elicit, and/or        cause.    -   elevate—to raise in importance, height, and/or relative        position.    -   elongated—drawn out, made spatially longer, and/or having more        length than width.    -   embodiment—an implementation, manifestation, and/or concrete        representation.    -   entrain—to carry along in a current.    -   estimate—(n) a calculated value approximating an actual        value; (v) to calculate and/or determine approximately and/or        tentatively.    -   exemplary—serving as an example, instance, and/or illustration.    -   extend—to reach spatially outward, stretch, cover, and/or span.    -   first—a label for a referenced element in one or more patent        claims, but that label does not necessarily imply any type of        ordering to how that element (or any other elements of a similar        type) is implemented in embodiments of the claimed subject        matter.    -   fixed—a stable and/or unalterable form; substantially unchanged        over a time period; and/or secured and/or incapable of        translating with respect to a related object.    -   floor—a supporting surface of a structure and/or a lower limit        and/or base.    -   flow—(n) a stream and/or current; (v) to move and/or run        smoothly with unbroken continuity, as in the manner        characteristic of a fluid.    -   foil—an elongated solid object with a shape such that, when        placed in fluid that is moving with respect to the foil (i.e.,        the fluid and/or the foil can be moving with respect to a fixed        reference point, so long as there is differential movement        between the fluid and foil), at a suitable angle of attack the        flow of fluid around the foil can produce differential        velocities in various streams of that flow, potentially leading        to vortices, eddies, and/or a turbulent wake in at least some of        those streams, and particularly those streams that pass below        the lower surface of the foil.    -   for—with a purpose of    -   forward—directed toward a point in advance; in a direction in        front of;    -   and/or at a position ahead of with respect to a flow direction.    -   frame—a structure adapted to support and/or contain something.    -   from—used to indicate a source, origin, and/or location thereof.    -   further—in addition.    -   gap—an aperture, break, opening, and/or a space within and/or        between objects.    -   generate—to create, produce, give rise to, and/or bring into        existence.    -   given—known, identified, specified, and/or determined.    -   handle—a part and/or element adapted to be held, seized,        grasped, and/or receive an applied force.    -   having—including but not limited to.    -   hold—to grasp in one's hands; to keep and/or maintain the        existing state, condition, and/or position of; and/or to put in,        keep, and/or maintain in a desired state, condition, and/or        position.    -   hydrodynamic—Of, relating to, or operated by the force of liquid        in motion.    -   including—including but not limited to.    -   initialize—to prepare something for use and/or some future        event.    -   inlet—an opening providing a means of entrance.    -   install—to connect or set in position and prepare for use.    -   integral—formed or united into another entity.    -   into—toward, in the direction of, and/or to the inside of;        and/or to a condition, state, or form of.    -   is—to exist in actuality.    -   laminar flow—nonturbulent motion of a fluid in which parallel        layers have different velocities relative to each other.    -   length—a longest dimension of something and/or the measurement        of the extent of something along its greatest dimension.    -   lift—to direct or carry from a lower to a higher position; to        raise; and/or to elevate.    -   longitudinal—of and/or relating to a length; placed and/or        running lengthwise.    -   longitudinal axis—a straight line defined parallel to an        object's length and passing through a centroid of the object.    -   lower—in a low position relative to something else.    -   maintain—to retain, preserve, sustain, keep in an existing        state, and/or continue to obtain.    -   major—greater than others in scope, size, extent, and/or effect.    -   may—is allowed and/or permitted to, in at least some        embodiments.    -   method—one or more acts that are performed upon subject matter        to be transformed to a different state or thing and/or are tied        to a particular apparatus, said one or more acts not a        fundamental principal and not pre-empting all uses of a        fundamental principal.    -   move—to change a position and/or place.    -   near—a distance of less than approximately [X].    -   net—an openwork fabric made of threads and/or cords that are        woven and/or knotted together at regular intervals and/or a        fabric consisting of a uniform open mesh made by weaving,        twisting, knotting, crocheting, etc.    -   no—an absence of and/or lacking any.    -   non-destructively—to perform substantially without damaging;        and/or of, relating to, and/or being a process that does not        result in damage to the subject material and/or product and/or        results in such minimal damage that the subject material and/or        product can be re-used for its intended purpose.    -   one—being and/or amounting to a single unit, individual, and/or        entire thing, item, and/or object.    -   open—not closed.    -   operable—practicable and/or fit, ready, and/or configured to be        put into its intended use and/or service.    -   operative—when in operation for its intended use and/or service.    -   or—a conjunction used to indicate alternatives, typically        appearing only before the last item in a group of alternative        items.    -   outside—beyond a range, boundary, and/or limit; and/or not        within.    -   parallel—of, relating to, or designating lines, curves, planes,        and/or or surfaces everywhere equidistant.    -   pass—to move by something and/or to cause to move.    -   per—for each and/or by means of.    -   perpendicular—intersecting at or forming substantially right        angles.    -   pivot—to rotate, revolve, and/or turn.    -   pivotable—capable of pivoting.    -   plane—a substantially flat surface and/or a surface containing        all the straight lines that connect any two points on it.    -   plurality—the state of being plural and/or more than one.    -   portion—a part, component, section, percentage, ratio, and/or        quantity that is less than a larger whole.    -   position—(n) a place, orient, and/or location, often relative to        a reference point. (v) to put in a place, orientation, position,        and/or location.    -   pre-—a prefix that precedes an activity that has occurred        beforehand and/or in advance.    -   predetermine—to determine, decide, and/or establish in advance.    -   prevent—to impede, resist, hinder, avert, stop, and/or keep from        happening.    -   prior—before and/or preceding in time or order.    -   probability—a quantitative representation of a likelihood of an        occurrence.    -   product—something produced by human and/or mechanical effort.    -   project—to calculate, estimate, or predict.    -   provide—to furnish, supply, give, and/or make available.    -   range—a measure of an extent of a set of values and/or an amount        and/or extent of variation.    -   ratio—a relationship between two quantities expressed as a        quotient of one divided by the other.    -   receive—to get as a signal, take, acquire, and/or obtain.    -   recommend—to suggest, praise, commend, and/or endorse.    -   reduce—to make and/or become lesser and/or smaller.    -   remain—to stay in substantially a same location, position,        and/or state.    -   remove—to free, take off, unbind, unfasten, take away, and/or        shift or move from one place or position to another.    -   repeat—to do again and/or perform again.    -   repeatedly—again and again; repetitively.    -   request—to express a desire for and/or ask for.    -   resident—located and/or present.    -   resilient—elastic and/or capable of regaining its original shape        or position after bending, stretching, compression, and/or other        deformation.    -   rest—to not substantially move and/or to be supported by.    -   result—(n.) an outcome and/or consequence of a particular        action, operation, and/or course; (v.) to cause an outcome        and/or consequence of a particular action, operation, and/or        course.    -   rotation—an act and/or process of turning around a center and/or        an axis.    -   said—when used in a system or device claim, an article        indicating a subsequent claim term that has been previously        introduced.    -   scrape—to rub a surface with an edged device.    -   second—a label for an element in one or more patent claims, the        element other than a “first” referenced element of a similar        type, but the label does not necessarily imply any type of        ordering to how that “second” element or the “first” element is        implemented in embodiments of the claimed subject matter.    -   select—to make a choice or selection from alternatives.    -   separate—to disunite, space apart, set apart, and/or keep apart        and/or to be positioned intermediate to.    -   separator—a physical structure that is configured to disunite,        space apart, set apart, and/or keep apart and/or to be        positioned intermediate to.    -   set—a related plurality.    -   simultaneously—happening, existing, and/or done at substantially        the same time.    -   slide—to, in a smooth and/or continuous motion, move one object        relative to another.    -   slider—a device configured to slide.    -   smooth—free from irregularities, obstructions, impediments,        roughness, and/or projections.    -   species—a class of individuals and/or objects grouped by virtue        of their common attributes and assigned a common name; a        division subordinate to a genus.    -   spring—a flexible elastic object, such as a coil of wire, bent        bar, coupled set of plates, washer, etc., that regains its        original shape after being compressed or extended, is used to        store mechanical energy, and is often made of hardened and        tempered material, such as steel. Types of springs can include        coil springs, helical springs, conical springs, torsion springs,        tension springs, compression springs, leaf springs, V-springs,        spiral springs, spring washers, gas springs, rubber bands, etc.    -   store—to place, hold, and/or retain data, typically in a memory.    -   stream—a flow of water and/or other fluid.    -   substantially—to a great extent and/or degree.    -   support—to bear the weight of, especially from below.    -   surface—the outer boundary of an object and/or a material layer        constituting and/or resembling such a boundary.    -   swimming pool—a structure, often a concrete-lined excavation of        rectangular shape, that is filled with water and used for        swimming.    -   system—a collection of mechanisms, devices, machines, articles        of manufacture, processes, data, and/or instructions, the        collection designed to perform one or more specific functions.    -   tension—a deformation of an at least partially elastic body.    -   that—a pronoun used to indicate a thing as indicated, mentioned        before, present, and/or well known.    -   through—across, among, between, and/or in one side and out the        opposite and/or another side of    -   to—a preposition adapted for use for expressing purpose.    -   touch—(v) to make direct physical contact with.    -   toward—used to indicate a destination and/or in a physical        and/or logical direction of.    -   transform—to change in measurable: form, appearance, nature,        and/or character.    -   transmit—to send as a signal, provide, furnish, and/or supply.    -   traverse—to pass and/or travel along, across, over, and/or        through.    -   treatment—an act, manner, or method of handling and/or dealing        with someone and/or something.    -   turbulence—the often haphazard secondary motion caused by eddies        within a moving fluid.    -   turbulent—characterized by turbulence; agitated; and/or        churning.    -   turbulent flow—the motion of a fluid having local velocities        and/or pressures that fluctuate randomly or irregularly.    -   under—below, beneath, and/or in a lower position or place than.    -   uninterrupted—continuous and/or continuing in space without        interruption.    -   upon—immediately or very soon after; and/or on the occasion of.    -   upper—in a high position relative to something else.    -   use—to put into service.    -   variable—(n) a property, parameter, and/or characteristic        capable of assuming any of an associated set of values. (adj)        likely to change and/or vary; subject to variation; and/or        changeable.    -   via—by way of and/or utilizing.    -   water—a transparent, odorless, tasteless liquid containing        approximately 11.188 percent hydrogen and approximately 88.812        percent oxygen, by weight, characterized by the chemical formula        H2O, and, at standard pressure (approximately 14.7 psia),        freezing at approximately 32° F. or 0 C and boiling at        approximately 212° F. or 100 C.    -   water-borne—existing in and/or carried by water.    -   water container—a receptacle in which water is held, retained,        and/or limited in movement, and which typically has an at least        partially open top and/or a nondestructively openable top and/or        lid, such as a swimming pool, hot tub, fountain, fish pond, bird        bath, fish tank, water garden, sump, collection basin, pond,        stream, river, etc.    -   weight—a force with which a body is attracted to Earth or        another celestial body, equal to the product of the object's        mass and the acceleration of gravity; and/or a factor and/or        value assigned to a number in a computation, such as in        determining an average, to make the number's effect on the        computation reflect its importance, significance, preference,        impact, etc.    -   when—at a time and/or during the time at which.    -   wherein—in regard to which; and; and/or in addition to.    -   with—accompanied by.    -   with regard to—about, regarding, relative to, and/or in relation        to.    -   with respect to—about, regarding, relative to, and/or in        relation to.    -   within—inside the limits of.    -   zone—a region and/or volume having at least one predetermined        boundary.        Note

Various substantially and specifically practical and useful exemplaryembodiments of the claimed subject matter are described herein,textually and/or graphically, including the best mode, if any, known tothe inventor(s), for implementing the claimed subject matter by personshaving ordinary skill in the art. References herein to “in oneembodiment”, “in an embodiment”, or the like do not necessarily refer tothe same embodiment.

Any of numerous possible variations (e.g., modifications, augmentations,embellishments, refinements, and/or enhancements, etc.), details (e.g.,species, aspects, nuances, and/or elaborations, etc.), and/orequivalents (e.g., substitutions, replacements, combinations, and/oralternatives, etc.) of one or more embodiments described herein mightbecome apparent upon reading this document to a person having ordinaryskill in the art, relying upon his/her expertise and/or knowledge of theentirety of the art and without exercising undue experimentation. Theinventor(s) expects any person having ordinary skill in the art, afterobtaining authorization from the inventor(s), to implement suchvariations, details, and/or equivalents as appropriate, and theinventor(s) therefore intends for the claimed subject matter to bepracticed other than as specifically described herein. Accordingly, aspermitted by law, the claimed subject matter includes and covers allvariations, details, and equivalents of that claimed subject matter.Moreover, as permitted by law, every combination of the herein describedcharacteristics, functions, activities, substances, and/or structuralelements, and all possible variations, details, and equivalents thereof,is encompassed by the claimed subject matter unless otherwise clearlyindicated herein, clearly and specifically disclaimed, or otherwiseclearly unsuitable, inoperable, or contradicted by context.

The use of any and all examples, or exemplary language (e.g., “such as”)provided herein, is intended merely to better illuminate one or moreembodiments and does not pose a limitation on the scope of any claimedsubject matter unless otherwise stated. No language herein should beconstrued as indicating any non-claimed subject matter as essential tothe practice of the claimed subject matter.

Thus, regardless of the content of any portion (e.g., title, field,background, summary, description, abstract, drawing figure, etc.) ofthis document, unless clearly specified to the contrary, such as viaexplicit definition, assertion, or argument, or clearly contradicted bycontext, with respect to any claim, whether of this document and/or anyclaim of any document claiming priority hereto, and whether originallypresented or otherwise:

-   -   there is no requirement for the inclusion of any particular        described characteristic, function, activity, substance, or        structural element, for any particular sequence of activities,        for any particular combination of substances, or for any        particular interrelationship of elements;    -   no described characteristic, function, activity, substance, or        structural element is “essential”; and    -   within, among, and between any described embodiments:        -   any two or more described substances can be mixed, combined,            reacted, separated, and/or segregated;        -   any described characteristic, function, activity, substance,            component, and/or structural element, or any combination            thereof, can be specifically included, duplicated, excluded,            combined, reordered, reconfigured, integrated, and/or            segregated;        -   any described interrelationship, sequence, and/or dependence            between any described characteristics, functions,            activities, substances, components, and/or structural            elements can be omitted, changed, varied, and/or reordered;        -   any described activity can be performed manually,            semi-automatically, and/or automatically;        -   any described activity can be repeated, performed by            multiple entities, and/or performed in multiple            jurisdictions.

The use of the terms “a”, “an”, “said”, “the”, and/or similar referentsin the context of describing various embodiments (especially in thecontext of the following claims) are to be construed to cover both thesingular and the plural, unless otherwise indicated herein or clearlycontradicted by context.

The terms “comprising,” “having,” “including,” and “containing” are tobe construed as open-ended terms (i.e., meaning “including, but notlimited to,”) unless otherwise noted.

When any number or range is described herein, unless clearly statedotherwise, that number or range is approximate. Recitation of ranges ofvalues herein are merely intended to serve as a shorthand method ofreferring individually to each separate value falling within the range,unless otherwise indicated herein, and each separate value and eachseparate sub-range defined by such separate values is incorporated intothe specification as if it were individually recited herein. Forexample, if a range of 1 to 10 is described, that range includes allvalues therebetween, such as for example, 1.1, 2.5, 3.335, 5, 6.179,8.9999, etc., and includes all sub-ranges therebetween, such as forexample, 1 to 3.65, 2.8 to 8.14, 1.93 to 9, etc., even if those specificvalues or specific sub-ranges are not explicitly stated.

When any phrase (i.e., one or more words) appearing in a claim isfollowed by a drawing element number, that drawing element number isexemplary and non-limiting on claim scope.

No claim or claim element of this document is intended to invoke 35 USC112(f) unless the precise phrase “means for” is followed by a gerund.

Any information in any material (e.g., a United States patent, UnitedStates patent application, book, article, web page, etc.) that has beenincorporated by reference herein, is incorporated by reference herein inits entirety to its fullest enabling extent permitted by law yet only tothe extent that no conflict exists between such information and theother definitions, statements, and/or drawings set forth herein. In theevent of such conflict, including a conflict that would render invalidany claim herein or seeking priority hereto, then any such conflictinginformation in such material is specifically not incorporated byreference herein. Any specific information in any portion of anymaterial that has been incorporated by reference herein that identifies,criticizes, or compares to any prior art is not incorporated byreference herein.

Applicant intends that each claim presented herein and at any pointduring the prosecution of this application, and in any application thatclaims priority hereto, defines a distinct patentable invention and thatthe scope of that invention must change commensurately if and as thescope of that claim changes during its prosecution. Thus, within thisdocument, and during prosecution of any patent application relatedhereto, any reference to any claimed subject matter is intended toreference the precise language of the then-pending claimed subjectmatter at that particular point in time only.

Accordingly, every portion (e.g., title, field, background, summary,description, abstract, drawing figure, etc.) of this document, otherthan the claims themselves and any provided definitions of the phrasesused therein, is to be regarded as illustrative in nature, and not asrestrictive. The scope of subject matter protected by any claim of anypatent that issues based on this document is defined and limited only bythe precise language of that claim (and all legal equivalents thereof)and any provided definition of any phrase used in that claim, asinformed by the context of this document when reasonably interpreted bya person having ordinary skill in the relevant art.

What is claimed is:
 1. A water cleaner, comprising: a handle; acollection net configured to operatively collect debris resident inwater of a water container; a frame configured to attach to the handleand to operatively and substantially hold open a major inlet of the net;a collection blade integral to or attached to a bottom edge of theframe, the collection blade configured to operatively traverse alongand/or adjacent to a floor of the water container; and a hydrodynamicassembly configured to be attached to the frame, the hydrodynamicassembly comprising: an elongated hydrodynamic lift blade that defines ahydrodynamic lift blade longitudinal axis, a length, a substantiallysmooth upper surface, and a substantially smooth lower surface; at leastone arm configured to operatively attach the hydrodynamic lift blade tothe frame, the water cleaner configured to operatively resiliently biasthe hydrodynamic lift blade toward the floor; and the water cleanerconfigured to operatively define a gap between the hydrodynamic liftblade and the floor, the gap extending uninterrupted for at least 50percent of the length of the hydrodynamic lift blade.
 2. The watercleaner of claim 1, further comprising: at least one separatorconfigured to operatively separate the hydrodynamic lift blade from thefloor of the water container.
 3. The water cleaner of claim 1, furthercomprising: at least one separator configured to operatively separatethe hydrodynamic lift blade from the floor of the water container and tooperatively slide along the floor of the water container and to definethe gap.
 4. The water cleaner of claim 1, further comprising: at leastone separator configured to operatively separate the hydrodynamic liftblade from the floor of the water container and to operatively rollalong the floor of the water container and to define the gap.
 5. Thewater cleaner of claim 1, wherein: the hydrodynamic lift blade isconfigured to cause substantially turbulent flow in a flow stream thatpasses substantially below the hydrodynamic lift blade when the watercleaner moves in a direction that is substantially parallel to a planeof the floor of the water container.
 6. The water cleaner of claim 1,wherein: the hydrodynamic lift blade is configured to maintainsubstantially laminar flow in a flow stream that passes substantiallyabove the hydrodynamic lift blade when the water cleaner moves in adirection that is substantially parallel to a plane of the floor of thewater container.
 7. The water cleaner of claim 1, wherein: thehydrodynamic lift blade is configured to operatively entrain in anet-bound flow stream debris resting on the floor of the water containerwithout touching that debris.
 8. The water cleaner of claim 1, wherein:the hydrodynamic lift blade is configured to operatively direct debrisinto the collection net without touching that debris.
 9. The watercleaner of claim 1, wherein: the collection blade is configured tosubstantially prevent debris entrained in a net-bound flow stream by thehydrodynamic lift blade from flowing under the net when the watercleaner moves in a direction that is substantially parallel to a planeof the floor of the water container.
 10. The water cleaner of claim 1,wherein: the hydrodynamic assembly is configured to non-destructivelyremoveably attach to the frame.
 11. The water cleaner of claim 1,wherein: the at least one arm is configured to non-destructivelyreleaseably attach to the frame.
 12. The water cleaner of claim 1,wherein: a longitudinal cross-section of the hydrodynamic lift blade ishydrofoil-shaped.
 13. The water cleaner of claim 1, wherein: the atleast one separator is integral to or attached to the at least one arm.14. The water cleaner of claim 1, wherein: the at least one separator isintegral to or attached to the hydrodynamic lift blade.
 15. The watercleaner of claim 1, wherein: the water cleaner operatively biases thehydrodynamic lift blade toward the frame.
 16. The water cleaner of claim1, wherein: a position of the hydrodynamic lift blade with respect tothe collection blade is operatively variable.
 17. A water cleaner,comprising: a handle; a collection net configured to operatively collectdebris resident in water of a water container; a frame configured toattach to the handle and to operatively hold substantially open aprimary inlet of the net; a collection blade integral to or attached toa bottom edge of the frame, the collection blade configured tooperatively traverse along and/or adjacent to a floor of the watercontainer; and a hydrodynamic lift assembly configured to be attached tothe frame, the hydrodynamic lift assembly comprising: an elongatedhydrodynamic lift blade that defines a hydrodynamic lift bladelongitudinal axis; at least one arm configured to operatively attach thehydrodynamic lift blade to the frame; and at least one separatorconfigured to operatively prevent direct contact between thehydrodynamic lift blade and the floor and between the hydrodynamic liftblade and debris supported by the floor.
 18. The water cleaner of claim17, wherein: the hydrodynamic lift blade is configured to operativelycause substantially turbulent flow in a flow stream that passessubstantially below the hydrodynamic lift blade when the water cleanermoves in a direction that is substantially parallel to a plane of thefloor of the water container.
 19. The water cleaner of claim 17,wherein: the at least one arm is configured to operatively remain in afixed position with respect to the frame.
 20. The water cleaner of claim17, wherein: the hydrodynamic lift blade is configured to operativelyremain in a fixed position with respect to the frame.
 21. A water debrisentrainment assembly configured to be attached to a frame of a netdevice that is configured to collect debris from water in a watercontainer, the net device comprising a collection blade configured toscrape a floor of the water container, the assembly comprising anelongated hydrodynamic lift blade that defines a hydrodynamic lift bladelongitudinal axis, the hydrodynamic lift blade operatively configuredto: be located forward of the collection blade with respect to operativemovement of the net device; define an uninterrupted gap between itselfand the floor of at least 0.2 inches along at least 70% of the length ofhydrodynamic lift blade when the collection blade is in contact with thefloor; and direct debris into the collection net without touching thatdebris.
 22. The water cleaner of claim 17, wherein: the hydrodynamiclift blade is operatively configured to simultaneously cause, when thecollection blade is in contact with and moves along the floor,substantially turbulent flow in a first flow stream that passes belowthe hydrodynamic lift blade and substantially laminar flow in a secondflow stream that passes above an upper surface of the hydrodynamic liftblade.